Graphite bipolar plate leak detection system and method for performing leak detection on graphite bipolar plate

Abstract

The invention provides a graphite bipolar plate leak detection system and a method for performing leak detection on a graphite bipolar plate. The system comprises a leak detection air source; an air inlet control assembly which is positioned at the downstream of the leak detection air source and is used for independently opening / cutting off a supply line of the leak detection air source; a leak detection press-fit mechanism which is located at the downstream of the air inlet control assembly and is provided with a containing cavity, three cavity inlet detection channels and three cavity outlet detection channels, the three cavity inlet detection channels and the three cavity outlet detection channels being in fluid communication with the containing cavity, and the air inlet control assembly independently opening / cutting off supply of the supply line to the three cavity inlet detection channels of the leak detection press-fit mechanism; an exhaust control assembly which is located at the downstream of the press-fit mechanism and used for independently opening / cutting off the communication between the three cavity outlet detection channels of the leak detection press-fit mechanism and an output line of the leak detection air source; and a flow detector which is located on the downstream of the exhaust control assembly and used for detecting whether gas is exhausted from the output line or not. According to the leak detection system, the leak detection efficiency is greatly improved, and the leak detection operation is simple and rapid.

Description

technical field [0001] The invention relates to the field of fuel cells, more specifically, to a graphite bipolar plate leak detection system and a method for leak detection of graphite bipolar plates. Background technique [0002] Proton exchange membrane fuel cell is an energy conversion device that directly converts the chemical energy of fuel into electrical energy. It has the advantages of high energy density, high energy conversion efficiency, and zero emissions. [0003] The bipolar plate is one of the internal core components of the fuel cell. In order to ensure long-term efficient and stable operation of the fuel cell, the bipolar plate needs to meet the following functions: (1) battery conductor, connect the single cells in series through the bipolar plate to form a fuel cell stack; (2) reactant gas transmission channel, through The bipolar plate flow channel provides reaction gas to the membrane electrode; (3) the cooling fluid transmission channel manages the wa...

AI Technical Summary

Problems solved by technology

This can lead to fuel leaking into the cooling chamber causing safety problems, or coolant leaking into the fuel or oxidant chamber to stop the reaction, the latter of which is extremely harmful to the life of the fuel cell

(2) Leakage of oxidant chamber, fuel chamber and cooling chamber

[0005]The biggest problem with the current graphite bipolar plate leak detection device is that it takes a long time and cannot realize multi-chip rapid leak detection

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